Yahoo! uses temporary, automatic account locking as a security measure to protect accounts from unauthorized access. Sometimes you can also become temporarily locked out of your own account as a result. I...

Your account is locked . (This will happen if someone tries to log into your account unsuccessfully three...

You may have received a "Mobile Locked " error on an Android smartphone.

  I Think Someone Has Locked Me out of My Account

What to do if your account has been temporarily locked .

This article explains what may be causing your account to be locked as compromised. There are a couple of...

This situation may occur if your account has been compromised, or if you haven't accessed your account recently.

As an added security precaution, your account will be temporarily locked from access from new locations if multiple failed login attempts ...

Be assured that this email did come from our Yahoo! Account team, as they are educating all of our users about the benefits of this feature. By adding a mobile number to your accountYahoo! Account